Jig



E. HENRICSON JIG Filed Oc t. 21. 1926 July 1, 1930.

Q J vIWiFWlQ; h J E; A I. L- v Patented July1,' 1930 STATES l EDWINHENRICSON, or swam; MICHIGAN. A

JIG

Application filed October 21, 1925. se -mint, 143,052. v v parallel tothe front faceof the standard My invention aims to provide a jig thatmay be advantageously used for holding various kinds of work to bedrilled, bored or otherwise operated, the jig being designed so thatmaterial may be removed from the same to adapt the jig for other workthan that for which it is specially designed.

. My invention further aims to provide a jig with a substantiallyguidedv jawand novel means for raising and lowering the jaw relative toa stationar'ybushing support. The adjusting means, under normalconditions ensures a positive and reliable clamp for apiece of work, butthere are times when irregularities or inequalities of pieces of worknecessitate a better clamping action.

For this purpose the jaw adjusting mechanism includesan auxiliarytake-up device by which the throw or adjustment of the jig jaw may beregulated.

These improvements will be hereinafter specifically described and thenclaimed, and reference will now be had to the drawings, wherein 7 Figure1 is a side elevation of the jig, partly broken away and partly insection;

Fig. 2 is a front elevation of the jig, partly in section; and r V Fig.3 is a horizontal sectional view of the jig.

Reference will be had, to Figs. 1 to 3.inelusive showing a jig ascomprising a base 1 having a standard 2 and detachably mounted on theupper end of the standard,

. is an overhanging bushing support 4 which projects from the front.side of the standard 1. The upper end of the standard has a surplusamount of material 5 which may be trimmed off or otherwise removed so asto place the support 4 in a lowered position from that shown in Fig. 1.

The base 1, under the support 4, hasibored bearings 6 and snugly fittedin these bear -ings are parallel posts 7 having the lower ends thereofflush with the lower face of the base 1 and provided with sockets 8, sothat a tool may be mounted in said sockets to facilitate removal of saidposts. These posts extend upwardly from the base 1 by screw bolts 3 orother fastening means,

toserve as guides fora 9 that confronts thesupport 4 andcooperateslitherewithffor gripping a piece of work. The jaw 9 ,has

.tubular end portions .10, to i eceive the' posts 7 and the tubular endportions lOlbear against the front face of the standard and thuscooperate with the jaw 9 in sliding against the'standard to press thejaw in its V movement relative to the post 7,. Connecting the tubularportions. 10 of the jaw 9 is a web 11 spaced from the from face of-thestandard 2 so asto provide jalink'schamber orr'ecessi12. h a Y ICentrally of the standard 2 is' a transverse opening 13 communicating,with a bearing 14 to permit 'of a rocksh aft l5being jourg naled in thebearing and standard, Suit:

ably'fixed on the outer end of the rock shaft 15 is a crank or lever 16normally horizontal, as shown in Fig. 2 and adapted tobe swung from theposition shownin Fig. 2'upwalidly to a reve'rs'e position, at :the,opposite-side of the jig. One position of the crankbn lever 16'is for anopen condition of thejaw,

9 relative to (the support 4and theopp osite 7 position of the crank orlever represents a closed position of the jaw 9. 1 On "the inner endo'ffthef rock f'shaft -is, a concentricheacl 17 provided withan eccen'trically disposed-pin 18 journaled in the upperend of a link 19 slidablebetween the" head 17'fand the web 1110f the jaw struc:

ture; jOn'the lower end of the link" 19 is a:

pin20. jpurnaled in' an eccentrically disposed socket21fof a rotatablebearing 22 journaled in; the lower"port ion of the web 111 The bearing22' may be rotated andfixed relatlVB 'tO the web. 11 bya jam-nut 2 3,and nut audits bearing constitutes angauxiliary take-up connectionbetween the link 19 and the'slidable jaw structure.

i There may be irregularities or inequalities in the pieces, of work to'b e held iii ,th e jjig, If 'so,fthe auxiliary takeup, device maybequickly'adjusted so that there will be a ppsitive and reliable clampingaction of the aw 9 for holding a piece of work under the suport '4.However, theremay be pieces of work that could not be firmly held by thelim ited action'of the edjustable' jaw,'theree 10: i o 't pp r l d'f-.thQ QW idZ- r withithis surplus material embodied in the fore thisjaw has a surplus of material 24 v which can be removed when thejig isto be {adapted for work other than that for which -it-is originallydesigned. -AS shovvnapiece of Work within certain limits can be vfirmlgheldl Ifa, largerpiece of work is to behel material mayhe'lremoved fromthe gripping n face of the jaw-9; If a; smaller piece of Work is to beheld material may be removed jig it is possible to convert the jig into9;

- understood thetflthe 'st ueti ral elements; are susceptible to suchvariations and modifica-j 'holdingdevic'e for work of differentdimensions thari that for which it is originally a designed. l i t V titiis; thought, that the. utility offmy in; vention will be eigjparentwithout further is 'illflstratedfi' prefer ed embodiment of the g1..A-jig comprising a base/3e stander-don said base, an overhangingsupport mounted r on" the upper veiidbf Said standard posts earried by sz id basl e a, jaw elidable on sajid'posts egz iiiet saifl' sta idard, arook shaft ournalie din said. 'Stiiildflld, 1a b bearing mountedtrangvers'elyin' saidjaw for rotative adjustmentthereiria dhav ir gan'eccenti ie socket, and a link connection between said shaft andsocket,

i A jigeompriing sta e; stand'aicl o seidflbafse; anoyerhangiiig supportmounted i ppeiien of sai St hdard,p0sts car ried by ,saidbas'e, a jaiwslidableon said posts aggainstisaid'stairdard, ai ock shzift'joiltnaledjin fsaid bmndaiid, a link ponnecti'on between said rock shaft aiid saidjaw so that roeki ig of said shaft adjusts said'jaw, a nd anvecee itriotake-up l dviee; between "said Iiiik and "W y ,edii d 9 5 s aid basefanoverha nging sl port mounted against said standard; aiocks ha ftjournaled H in sz ici g taiidard g a bearing mounted trans-- i verseiysalidjaw ;f0 1}f rotative adjustment there n and having an eceentriesocket and an exposed:portio iideptedfor engagement by a wrench, alinkeXtehding from said rock. i shaft tosaid bearin membenand ,apin extending froirt 'saidfl pkjinto said socket. t

" n; testi i o iy whereof efiix my signature. 1

' ;v pwmpiiNmosonr j iii: in the diawing there

